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LOK PAO
Russian manned spacecraft module. 2 launches, 1971.06.26 (N-1 6L) to 1972.11.23 (LOK). Unique PAO developed for Soyuz lunar orbiter. Powerful sophisticated engine for lunar orbit rendezvous maneuvers and trans-earth injection. Equipment-engine section.

AKA: Priborno-agregatniy otsek. Status: Operational 1971. Thrust: 4.17 kN (937 lbf). Gross mass: 5,646 kg (12,447 lb). Unfuelled mass: 2,494 kg (5,498 lb). Specific impulse: 314 s. Height: 4.21 m (13.81 ft). Diameter: 2.15 m (7.05 ft).

Celestial navigation sensors and digital computer for navigation. Volna-20 fuel cells had a mass of 70 kg and could provide 1.5 kW of power at 27 V for 500 hours. The cells were fed by 600 kg of liquid hydrogen and oxygen. The water generated by the reaction of the hydrogen and oxygen was used by the crew.

The PAO consisted of several distinct sub-modules:

Electric System: 750.00 kWh. Electric System: 1.50 average kW.



Family: Manned spacecraft module. Country: Russia. Spacecraft: Soyuz 7K-LOK. Propellants: N2O4/UDMH.

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